SpringMVC如何获取表单数据(radio和checkbox)

SpringMVC获取表单数据

1、实体类

package cn.hadron.bean;
import java.io.Serializable;
import java.util.Arrays;
/**
 * create table users(
     id int auto_increment primary key,
     username varchar(45),
     password varchar(45),
     age int default 0
   );
   insert into users(username,password,age) values('hadron','123',18);
 * @author chengyq
 *
 */
// 域对象,实现序列化接口
public class UserBean implements Serializable {
    private Integer id;
    private String username;
    private String password;
    private String birthday;
    private Integer age;
    //测试单选按钮
    private String sex;
    //测试复选按钮
    private String[] favorite;
    public UserBean() {}
    public UserBean(String username, String password,int age) {
        this.username = username;
        this.password = password;
        this.age=age;
    }
    public UserBean(String username, String birthday,String sex) {
        this.username = username;
        this.birthday = birthday;
        this.sex=sex;
    }
    public Integer getId() {
        return id;
    }
    public String getUsername() {
        return username;
    }
    public String getPassword() {
        return password;
    }
    public Integer getAge() {
        return age;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String[] getFavorite() {
        return favorite;
    }
    public void setFavorite(String[] favorite) {
        this.favorite = favorite;
    }
    public String getBirthday() {
        return birthday;
    }
    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }
    @Override
    public String toString() {
        return "UserBean{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", birthday='" + birthday + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                ", favorite=" + Arrays.toString(favorite) +
                '}';
    }
}

2、控制器

package cn.hadron.controller;
import cn.hadron.bean.UserBean;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.util.ArrayList;
import java.util.List;
@Controller
@RequestMapping(value = "/f")
public class FormController {
    @RequestMapping(value="/getEditPage",method= RequestMethod.GET)
    public String getEditPage(Model model) {
        System.out.println("表单测试");
        UserBean user = new UserBean("jack","1997-7-1","女");
        // model中添加属性user,值是user对象
        model.addAttribute("user",user);
        //返回Edit.jsp页面
        return "edit";
    }
    @RequestMapping(value="/edit",method=RequestMethod.POST)
    public String edit(@ModelAttribute UserBean user,Model model) {
        System.out.println("获取表单数据:");
        //@ModelAttribute注解指示了参数应该从模型(这里所说的“模型”指 Model)中获取
        model.addAttribute("username", user.getUsername());
        model.addAttribute("birthday", user.getBirthday());
        model.addAttribute("sex", user.getSex());
        model.addAttribute("favorite", user.getFavorite());
        System.out.println("user="+user);
        //返回userPage.jsp页面
        return "userPage";
    }
    /**
     * 可以用@ModelAttribute注解的方法做一些初始化操作。
     * 当同一个controller中有多个方法被@ModelAttribute注解标记,
     * 所有被@ModelAttribute标记的方法均会被执行,按先后顺序执行,然后再进入请求的方法
     * @return
     */
    @ModelAttribute("webList")
    public List getWebList() {
        List webList = new ArrayList();
        webList.add("SpringMVC");
        webList.add("SpringBoot");
        webList.add("SpringCloud");
        return webList;
    }
}

3、页面

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>




测试form标签


用户信息编辑页面

姓名:
性别:
生日:
爱好:

SpringMVC如何获取表单数据(radio和checkbox)_第1张图片

<%--
  Created by IntelliJ IDEA.
  User: chengyq
  Date: 2018/9/3
  Time: 14:27
  To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>


    Title


您提交的用户信息

Username ${username}
Birthday ${birthday}
Sex ${sex}
favorite <% String[] favorite = (String[])request.getAttribute("favorite"); for(String f: favorite) { out.println(f); } %>

SpringMVC如何获取表单数据(radio和checkbox)_第2张图片

SpringMVC获取表单参数

以下几种方式只有在已搭好的SpringMVC环境中,才能执行成功!

一、首先,写一个登陆页面和一个Bean类

登陆页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
 




yyx博客后台登录


    
用户名:
密码:

java实体类

package com.yyx.model;
 
public class User{
    private String userName;
    private String userPwd;
 
    public String getUserName() {
        return userName;
    }
 
    public void setUserName(String userName) {
        this.userName = userName;
    }
 
    public String getUserPwd() {
        return userPwd;
    }
 
    public void setUserPwd(String userPwd) {
        this.userPwd = userPwd;
    }
}

二、获取表单数据的方法

1、直接把表单的参数写在Controller相应的方法的形参中

注意:控制器中方法的形参String userName,String userPwd名称必须和登陆页面的name="userName",name="userPwd"相同

package com.yyx.controller; 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping; 
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/login")
    public String loginByUser(String userName, String userPwd) {
        System.out.println("userName is:" + userName);
        System.out.println("userPwd is:" + userPwd);
        return "success";
    }
}

2.通过HttpServletRequest接收

控制器中

String userName=request.getParameter("userName");
String userPwd=request.getParameter("userPwd");

的参数名称必须和登陆页面的name="userName",name="userPwd"相同

package com.yyx.controller; 
import javax.servlet.http.HttpServletRequest; 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
 
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/login")
    public String loginByUser(HttpServletRequest request) {
        String userName=request.getParameter("userName");
        String userPwd=request.getParameter("userPwd");
        System.out.println("userName is:" + userName);
        System.out.println("userPwd is:" + userPwd);
        return "success";
    }
}

3.通过一个bean来接收

登陆页面的name="userName",name="userPwd"必须和Bean类的属性名称相同

package com.yyx.controller; 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping; 
import com.yyx.model.User;
 
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/login")
    public String loginByUser(User user) {
        System.out.println("userName is:" + user.getUserName());
        System.out.println("userPwd is:" + user.getUserPwd());
        return "success";
    }
}

4.利用js中ajax请求通过json数据接收

在页面中添加js代码

  

控制器中的代码和方法3中的相同。

以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。

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